Here are some numbers 11, 12, 16, 32, 36, 50, 64, 79, 81, 111, 121.

How many of them are perfect square numbers?

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All

None of thes

answer is A.

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Detailed Solution

Concept: To solve this question, first of all, we need to know about “Perfect Square Numbers”.
A perfect square is a number that can be expressed as the product of an integer by itself, or as the second exponent of an integer.
We will write down the perfect squares, starting from the square of 2 till we have a perfect square either equal to 121 or greater than 121. Then, we will match the numbers with the ones mentioned in the question, and the common ones will be our desired answer.
Question Image

Of the above-mentioned perfect squares, 16, 36, 64, 81 and 121 matches among the numbers mentioned in the question statement.
So, 16, 36, 64, 81 and 121 are perfect square numbers; these are 5 out of the given numbers in the question.
Hence, the Correct Answer is option 1.

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